9 to 11 hours for not fast charging is in my opinion extremely long, 2 hours would be more realistic. Do you by a chance use the official charger? If not, I highly recommend trying to reproduce it with the official one.

Thanks for your reply. Yes, I use the phone's official charger. I read that fast charging is the one that takes 2 hours max. But couldn't find any official info about charging hours when turning off the fast charge option at all. That's why I was seeking a samsung expert employee to answer me in this forum. Hopefully I am in the right place.

Thanks for your reply. Yes, I use the phone's official charger. I read that fast charging is the one that takes 2 hours max. But couldn't find any official info about charging hours when turning off the fast charge option at all. That's why I was seeking a samsung expert employee to answer me in this forum. Hopefully I am in the right place.

When I got my first new S9 in october I had problems charging. I discovered that the charger was faulty and only worked in fast charging mode. I suggest you get yourself another charger, both modes should work, and I would agree with @SjorsK that a normal charge should take 2h or so.